161313101 has 2 divisors, whose sum is σ = 161313102. Its totient is φ = 161313100.

The previous prime is 161313091. The next prime is 161313107. The reversal of 161313101 is 101313161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 109098025 + 52215076 = 10445^2 + 7226^2 .

It is an emirp because it is prime and its reverse (101313161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161313101 - 2¹⁴ = 161296717 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161313101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161313107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80656550 + 80656551.

It is an arithmetic number, because the mean of its divisors is an integer number (80656551).

Almost surely, 2^161313101 is an apocalyptic number.

It is an amenable number.

161313101 is a deficient number, since it is larger than the sum of its proper divisors (1).

161313101 is an equidigital number, since it uses as much as digits as its factorization.

161313101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 161313101 is about 12700.9094556256. The cubic root of 161313101 is about 544.3646058581.

Adding to 161313101 its reverse (101313161), we get a palindrome (262626262).

The spelling of 161313101 in words is "one hundred sixty-one million, three hundred thirteen thousand, one hundred one".